SftPrintPreview.GetDDBSize Method
Retrieves the display and print size of a device dependent bitmap.
Syntax
| VB.NET | object.GetDDBSize(ByVal BitmapHandle As Integer, ByVal PrinterDC As Integer, ByRef WPrinterPix As Integer, ByRef HPrinterPix As Integer, ByRef WDispPix As Integer, ByRef HDispPix As Integer) |
| VB | object.GetDDBSize(ByVal BitmapHandle As Long, ByVal PrinterDC As Long, WPrinterPix As Long, HPrinterPix As Long, WDispPix As Long, HDispPix As Long) |
| C#.NET | void object.GetDDBSize(int BitmapHandle, int PrinterDC, out int WPrinterPix, out int HPrinterPix, out int WDispPix, out int HDispPix); |
| VC++ | HRESULT object->GetDDBSize(long BitmapHandle, long PrinterDC, long* WPrinterPix, long* HPrinterPix, long* WDispPix, long* HDispPix); |
| C | HRESULT object->raw_GetDDBSize(long BitmapHandle, long PrinterDC, long* WPrinterPix, long* HPrinterPix, long* WDispPix, long* HDispPix); |
object
A SftPrintPreview object.
BitmapHandle
The bitmap handle of the bitmap, for which the dimensions are returned.
PrinterDC
The printer device context.
WPrinterPix
Returns the printed width of the bitmap (in pixels).
HPrinterPix
Returns the printed height of the bitmap (in pixels).
WDispPix
Returns the screen width of the bitmap (in pixels).
HDispPix
Returns the screen height of the bitmap (in pixels).
Comments
The GetDDBSize method retrieves the display and print size of a device dependent bitmap.
This method is not supported for use with Visual Basic 6.0
Device dependent bitmaps (screen bitmaps) can be printed using the PrintDDB method. Screen bitmaps cannot usually not be printed without losing their original size (e.g., using BitBlt). The PrintDDB method is used to print bitmaps instead. When printing a screen bitmap, the width and height of the bitmap need to be scaled to retain their approximate original dimensions once printed.
Examples
VB.NET
If (Counter Mod (50 + 1)) = 0 Then
' Print a bitmap
' get bitmap size
Dim bmp As Bitmap = New Bitmap(pictureBox1.Image)
Dim wPrinterPix As Integer, hPrinterPix As Integer, wDispPix As Integer, hDispPix As Integer
Dim hBmp As IntPtr = bmp.GetHbitmap()
AxSftPrintPreview1.GetDDBSize(hBmp.ToInt32(), AxSftPrintPreview1.RenderingInfo.hDC, wPrinterPix, hPrinterPix, wDispPix, hDispPix)
' make sure entire image fits on remaining page
If yPrinter + hPrinterPix > outRect.Bottom Then
DeleteObject(hBmp)
Exit While
End If
' print bitmap, horizontally centered
AxSftPrintPreview1.PrintDDB(hBmp.ToInt32(), AxSftPrintPreview1.RenderingInfo.hDC, xPrinter + (outRect.Width - wPrinterPix) / 2, _
yPrinter, wPrinterPix, hPrinterPix, wDispPix, hDispPix) View Entire Sample Code
C#
if ((counter % (50+1)) == 0)
{
// Print a bitmap
// get bitmap size
Bitmap bmp = new Bitmap(pictureBox1.Image);
int wPrinterPix, hPrinterPix, wDispPix, hDispPix;
IntPtr hBmp = bmp.GetHbitmap();
axSftPrintPreview1.GetDDBSize((int) hBmp, (int) axSftPrintPreview1.RenderingInfo.hDC, out wPrinterPix, out hPrinterPix, out wDispPix, out hDispPix);
// make sure entire image fits on remaining page
if (yPrinter + hPrinterPix > outRect.Bottom) {
DeleteObject(hBmp);
break;
}
// print bitmap, horizontally centered
axSftPrintPreview1.PrintDDB((int) hBmp, axSftPrintPreview1.RenderingInfo.hDC, xPrinter +(outRect.Width-wPrinterPix)/2, View Entire Sample Code
C++
}
if ((counter % (50+1)) == 0)
{
// Print a bitmap
// get bitmap size
long wPrinterPix, hPrinterPix, wDispPix, hDispPix;
m_vPrintPreview1->GetDDBSize((long)(HBITMAP)m_BitmapPage, RenderInfo.hDCPrinter, &wPrinterPix, &hPrinterPix, &wDispPix, &hDispPix);
// make sure entire image fits on remaining page
if (yPrinter + hPrinterPix > outRect.bottom)
break;
// print bitmap, horizontally centered
m_vPrintPreview1->PrintDDB((long)(HBITMAP)m_BitmapPage, (long) pDC->m_hDC, xPrinter +((outRect.right-outRect.left)-wPrinterPix)/2,
yPrinter, wPrinterPix, hPrinterPix, wDispPix, hDispPix);
yPrinter += hPrinterPix; // next available space View Entire Sample Code
See Also SftPrintPreview Object | Object Hierarchy
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